One person is confirmed dead and five people were treated on scene after a crash on Highway 1 involving four vehicles, including a tanker truck carrying formaldehyde.

Highway 1 was closed in both directions after the multi-vehicle crash in the Fraser Canyon, which occurred Friday morning 15 km south of Spences Bridge.

The cause of the fiery crash is under investigation and the road reopened at about 9 p.m. Friday night.